@guoyunhe/downloader/dist/stripDirectory.js

Download large files with minimum RAM usage. Support tar.gz and zip extraction.

import { mkdir, readdir, rename, rm } from 'fs/promises';
import { join } from 'path';
export async function stripDirectory(dir, strip = 1) {
    if (strip < 1)
        return;
    const items = await scanDirectory(dir, strip + 1);
    const tmpDir = dir + '__old__';
    await rename(dir, tmpDir);
    await mkdir(dir);
    await Promise.all(Object.entries(items).map(async ([from, to]) => {
        rename(join(tmpDir, from), join(dir, to));
    }));
    await rm(tmpDir, { recursive: true });
}
async function scanDirectory(dir, depth = 1, prefix = '') {
    const result = {};
    if (depth < 1)
        return result;
    const items = await readdir(dir, { withFileTypes: true });
    for (let i = 0; i < items.length; i++) {
        const item = items[i];
        if (item.isDirectory() && depth > 1) {
            Object.assign(result, await scanDirectory(join(dir, item.name), depth - 1, join(prefix, item.name)));
        }
        else {
            result[join(prefix, item.name)] = item.name;
        }
    }
    return result;
}